Hydrazinderivate der Phtalazin- und Pyridazinreihe
作者:J. Druey、B. H. Ringier
DOI:10.1002/hlca.19510340122
日期:——
Es werden Hydrazinoderivate des Phtalazins und des Pyridazins beschrieben, über deren pharmakologisches Interesse an anderer Stelle berichtet worden ist. Die am Grundtypus vorgenommenen chemischen Abwandlungen betreffen die Substitutionen am heterocyclischen oder aromatischen Ring, den Ersatz des aromatischen Kerns durch den Pyridinring und schliesslich Veränderungen am Hydrazinrest.
New Synthesis of Pyrido[2,3-<i>d</i>] and [3,2-<i>d</i>]Oxazines
作者:Amin F. Fahmy、Jürgen Sauer、Mohamed Salah K.Youssef、Mohamed Said AbdelHalim、Mamdouh A. Hassan
DOI:10.1080/00397919808004864
日期:1998.8
Abstract N-Hydroxyquinolinimide 1 reacts with each of aromatic amines, hydrazine hydrate and aromatic hydrocarbons to give arylcarbamoyl pyridines 2, pyrrolopyridines 3, pyridopyridazines 4 and pyridooxazinones 5 and 6. The heterocycles 5 and 6 can be transformed to the condensed systems, triazolopyridopyridazines 14 and 15 through series of reactions.
SYNTHESIS OF ISOMERIC PYRIDOOXAZINONES, PYRIDOPYRIDAZINES AND TRIAZOLOPYRIDOPYRIDAZINES FROM<i>o</i>-AROYLPYRIDINECARBOXYLIC ACIDS
作者:Mohamed Salah K. Youssef、Amin F. Fahmy、Mohamed S. Abdel Halim、Mamdouh A. Hassan、Jürgen Sauer
DOI:10.1080/00304940509354954
日期:2005.6
investigation deals with the synthesis of isomeric pyridooxazine derivatives and some related compounds via an alternativenewroute using the acids 2 and 3. Thus, the reaction of quinolinic anhydride (1) with anhydrous AlCl, in benzene, toluene and chlorobenzene was repeated, and also carried out in anisole, to yield 2a-d in 61-71% yields. As reported previously, none of the corresponding 2-aroyl